Balancing device for rolls in rolling mills



Sept. 3, 1929.

A. T. KELLER BALANGING DEVICE FOR ROLLS IN ROLLING MILLS 2 Sheets-Sheet Filed March 51, 1927 I INVENTOR 'WTTORNE Sept. 3, E929.l A. T. KELLER BALANCING DEVICE FOR ROLLS IN ROLLING MILLS Filed March 3l, 1927 2 Sheets-Sheet 2 i i? INVENTOR 3K fr Tallf:

BY WJ@ -roll and exteriorly of the housings.

Patented Sept. 3, 1929.v

iJ-NiTED STATES 1,727,122 PATENT OFFICE.

AMBER/L' 'I'. KELLER, 0F--BETHLEHEM, PNNSYLVANIA, ASSIGNOR TO BETHLEHEM STEEL COMPANY.

BALANCING- DEVICE FOR ROLLS IN ROLLING MILLS.

Application filed March 31, 1927. Serial No. 179,784.

M invention relates to rolling mills and particularlyto means for lifting the movable upper roll and for holding it against the adjusting screws. i

Heretofore, a single liftingcylinder, disposed intermediate the housings, has been suggested for supporting the carriers which support the top roll and constant pressure has been Iutilized to operate said cylinder to perform the function of lifting said roll. It

has also been known to employ for this purpose a cylinder disposed at each end of the In the adaption employing the single cylinder the amount of lift to the roll that can be obtained is limited by the position of the 'cross shaft for operating in unison the sleeves which engage the adjusting screw. When employing a cylinder at each end ofthe roll, the roll bearings and adjusting screws do not with certainty receive an e ual amount of pressure and are thus subject to unequal Wear. It is, therefore, one of the objects of my 1nvention to provide a lifting device' for supporting the roll of the rolling mill which equally distributes the lifting pressure at each end of the'roll and arranged so that the roll may'be raised a considerable distance without interference from the roll ad justment mechanism.

The novel features of my invention will be more fully understood from the followlng description and claims taken withthe drawin in which:

ig. 1 is a front elevationbf a two-high rolling mill partially in cross section .and illustrating an embodiment of my invention; the upper roll being shown in its lower position; j l f Fig. 2 is a partial cross section taken on line II--II in Fig. 1, showing the lifting cylinder when the upper roll is in the upper position;

Fig. 3 is a partial cross section taken on line III-III in Fig. v1, illustrating thc beam for supportingthe rolls.

Referring to the drawings: 10 designates the roll housings which may be of any usual construction, and 11 the bridge or upper structure between and connecting the upper ends of the housings.

The lower and upper rolls are indicated by the numerals 12 and 13 respectively, and the bearings 14 rf the latter engage the rotatable adjustii g screws 15 which are raised and lowered by their engagement with the nuts 16 in the manner well known to the art. The upper squared ends ofthe screws 15 engage the squared openings of the sleeves 17. Formed at the exterior of said sleeves are bevel gears 17 which mesh with bevel gears 18 mounted on the shaft 19. Keyed to the latter is a driven pinion 20 which may be driven from any suitable power source when it is desired to raise or lower the screws 15.

y Mounted on the bridge 11 are ltwo cylinders 21, one of which is disposed at the front side of the bridge, and the other at the rear side. W'ithin eachjcylinder 21 is a lifting plunger 22 which extends beyond its cylinder. Supported between the eX- tending ends of the plungers is a yoke member 23. The latter member is slidingly constrained to move in a vertical path byl means of the guiding walls of the recess 24 formed in the bridge 11 and has depending therefrom hangers 25. The lower ends of the hangers 25 are bolted to an apertured bracket 26 having a vertical disposed arm 27, to which the hangers 25 are bolted and a. horizontally extending arm 28 provided with an opening 29.

A beam 30 extends longitudinally of the rolls and may consist of two pairs of parallel bars 31, spaced apart `by means of spacers 32, and secured together by means of bolts 33.

Mounted in the aperture formed in the bracket 26 and the opening 29 are pins 34 and 35 respectively which project into suitable openings formed in the bars 31 to con,- stitute a substantially rigid lconnection between tlie beam 30 and the hangers 25. The carriers or bearings 36 are suspended from the beam 30, by hangers 37, and engage the journal of the roll 13 to support the latter. The beam may be extended as shown in Fig. 1, to piovide a support for the hanger, 38 to carry the spindle supporting beam'39 in a manner and for a purpose well known to the' art.

The cylinders are connected, in a vwell known manner, to a constant Huid pressure supply, such as an accumulator, which will maintain Within the cylinders sufficient pressure to hold the roll 13 and its bearings 14 against the adjusting screws 15, which may be operated to shift the roll to anyy desired position.

While I have shown my invention in but one form, it will be obvious to those skilled in the art that it is not so limited, but is susceptible of various other changes and modications without departing from the spirit thereof, and I desire, therefore, that only such limitations shall be placed thereupon as are imposed by the prior art or as are specifically set forth in the appended claims. a

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a rolling mill, a roll, a housing, an adjusting means, a drive member for operating said means, a pair of lifting devices disposed one at each side of said drive member and mounted on said housing, a yoke supported between said devices, means depending from said yoke, and meanscarried by said depending means for supporting said roll.

2. In rolling mill, a roll, a housing, an adjusting means mounted on said housing, a drive member for operating lsaid means, a lift device, a roll supporting means, and means depending from said device rigidly connected to said supporting means so as to maintain the latter means horizontal.

3. In a rolling mill, a roll, a housing, an adjusting means mounted on said housing, a drive member for operating said means, a

Alift device disposed to one side of said drive member, a second lift device disposed at the other slde of said drive member, ayoke member supported on said devices, a roll; supporting means, and means connecting` said supporting meansto .said yoke member.

4. In-a rolling'mill, a roll, a housing, an adjusting means, a'drive member for operating said means, a lift device disposed at one side of said drive member, a second lift device disposed at the other side of said drive member, a yoke member supported on said devices, a supporting member extending longitudinally of said roll, means carried by said supporting member for carrying said roll, and means depending from said yoke, rigidly connected to said carrying member.

5. In a rolling mill, a roll, a housing having a guideway, means for backing said roll, a drive member for ISaid means, a pair of lifting devices disposed one at each side of saiddrive member and mounted on said housing, Aa yoke slidingly mounted infsaid guideway and supported on said lifting devices, and a roll supporting means carried by said yoke.

` 6. In a rolling mill, a housing, a roll, an adjustable means for backing said roll, a lifting device, a carrier member supported by said lifting device, means for supporting said roll, and means connecting the latter means to said carrier member adapted to prevent relative vertical angular movement therebetween.

In testimony whereof I hereuntd `affix my signature.

ALBERT T. KELLER. 

